Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: Why not allow empty code blocks?
Date: Sun, 24 Jul 2016 21:27:13 +1000
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Message-ID: <mailman.87.1469359641.22221.python-list@python.org>
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On Sun, Jul 24, 2016 at 8:45 PM, BartC <bc@freeuk.com> wrote:
> 'end' to terminate a block can be emulated of course:
>
> end=0
>
> def fn(a):
>     if a<=1:
>         return 1
>     else:
>         return fn(a-1)
>     end
> end
>
> And in this example it wouldn't impact on performance as it is not
> evaluated.

Actually, they would be (you'll have a LOAD_GLOBAL followed by
POP_TOP). Much better to use Python's inbuilt hash-braces support,
available via a hash-future directive.

#from __future__ import braces

def fn(a): #{
    if a <= 1: #{
        return 1
    #}
    else: #{
        return fn(a-1)
    #}
#}

ChrisA